Anything you put out on the internet can be a positive or a negative. This sort of post is not a positive.
Part of the reason software buyers pay good rates (those who do) is because they need to know they are dealing with competent service providers. If the provider is offering services for less than that which would sustain a business (which many cash-strapped freelancers do) then that's a red flag. If I have a critical, high profile project, then I want to know that the person I'm handing it off to is going to be relatively stable. Think about this from an investor perspective, the people involved in the project need to be able to recover financially from a trip to the hospital (as opposed to going homeless).
I need to know you can pay the rent and keep the lights on. If you are one step away from financial disaster, then you're too much of a risk to partner with on my project. That may sound bad, but that's reality.
His review will not look good for taking on better paying work. The people who will take a chance on him are likely the same sort of people who he feels has been screwing him over.
Bottom line, you might be one misstep away from the streets, but that's not information you want to include on a cover-letter.